# tmux.WindowFilter.Predicate

- **Module:** tmux.WindowFilter
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-go/blob/52968a3181c1c9e6d1b26c565d4b170968ae61c0/tmux/filter_generated.go#L2720
- **Page:** https://libtmux.org/en/go/latest/reference/tmux-windowfilter-predicate/

```
tmux.WindowFilter.Predicate() -> (func(*Window) bool, error)
```

Predicate validates the window filter and returns a local predicate for [Window] values materialized by a [Snapshot]; it never runs tmux. It traverses only loaded relations and returns false for a nil candidate.